Joint-protector for sewer-pipes.



F. W. LANG. JOINT PROTECTOR FOR SEWER PIPES.

APPLIOATION FILED JULY 'I, 1910.

' Patented Feb. 28, 1911.

'rlvu: NORRIS PETERS cm. VIAsuINcTaN, 9.1:.

NITED STATES PATENT OFFICE.

FREDERICK W. LANG, 0F MINNEAPOLIS, MINNESOTA.

JOINT-PROTECTOR FOR SEWER-PIPES.

To all whom it may concern:

Be it known that I, FREDERICK W. LANG, a citizen of the United States,residing at ldinn'eapolis, in the county of Hennepin and State ofMinnesota, have invented certion new and useful Improvements in Joint-Protectors for Sewer-Pipes; and I do hereby declare the following to bea full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and usethe same.

My invention has for its object to provide an improved joint for sewerpipes and similar conduits which are made of pipe sections havingloosely telescoped ends, and to this end the invent-ion consists of thenovel devices and combination of devices hereinafter described anddefined in the claim.

As is well known, sewer pipes are usually made up of sections connectedby loosely telescoped end joints which not only leak water, but permitthe roots of trees, in their search for moisture, to grow and work theirway between the joints and into the pipe sections, so that finally thesewer pipes become clogged with roots and materials collected thereby.

My invention provides an extremely simple and efficient device of smallcost, by the use of which the joints of sewer pipes and similar conduitsmay be made tight and thereby prevent roots from growing into or throughthe joints between the pipe sections.

In the accompanying drawings, which illustrate the invention, likecharacters indicate like parts throughout the several views.

Referring to the drawings: Figure 1 is a plan view showing two sectionsof sewer pipe and illustrating my improved joint connection or guardapplied thereto. Fig. 2 is a longitudinal section taken on the line :0 xof Fig. 1. Fig. 3 is a transverse section taken on the line 92 m of Fig.2. Fig. 4- is a transverse section taken on the line w m of Fig. 2, andFig. 5 is a detailed view in side elevation showing a packing ring usedin the improved joint.

The sewer pipe sections 1 are provided with enlarged ends 1 thattelescope loosely Specification of Letters Patent.

Application filed July 7, 1910.

Patented Feb. 28, 1911. Serial No. 570,745.

over the small ends of adjacent pipe sections in the customary way.

The numeral 2 indicates a pliable packing ring preferably of lead andwhich is of such size that it will snugly fit the small end of the pipesection, and being of pliable material, such. as lead, will adapt itselfto any irregularities in form of the pipe. The sewer pipe sections, asis well known, are quite irregular and not always of cylindrical formand hence, the pliable packing ring is an important feature. Thispliable metal packing ring will also stretch slightly to fit a slightlyenlarged portion of the pipe, or it may be hammered down and made to fita smaller portion of the pipe.

The numeral 3 indicates an annular shield preferably of sheet metal, thebody of which is adapted to loosely fit around an enlarged end 1 of thepipe section, and is provided with an inturned flange 3 at one end,which loosely fits around the body of the adjacent pipe section and isengageable with the packing ring 2, as best shown in Fig. 2.

The numeral 4 indicates cement which fills the space within the annularguard plate 3 and fills the annular space between the telescoped ends ofthe pipes, and between the enlarged end of the pipe and the surroundingportion of the said guard or shield.

In assembling the various elements of the device, the annular shield 3is first slipped over the small end of one of the pipe sec tions 1 andthen the pliable packing 2 is slipped over the same end of the pipesection and placed within the shield 3.

The cement is preferably placed within the shield or guard 3 before thelatter has been slid over the large end of the pipe, and then when theshield is forced out of position, as shown in Fig. 2, the cement will becrowded into all the crevices and when hardened will form a very tightjoint between the pipe sections and this joint will be further protectedfrom breakage, by means of the shield or guard 3.

What I claim is:

The combination with pipe sections, the one having a large endtelescoped over the smaller end of the other, of a pliable packing ringtelescoped on to "the smaller In testimony whereof I afiix my signature[pipe end, adjacent to the larger pipe ends, in presence of twoWitnesses.

' an annular metal shield telescoped over the said packing ring and thelarge pipe end, FREDERICK LANG 5 and cement contained Within said shieldand I Witnesses: forming a tight joint between the pipe sec- F. D.MERCHANT,

tions, substantially as described. HARRY D. KILGORE.

' 7 Copies of this patent may be obtained for five cents each, byaddressing the Commissioner of Patents,

Washington, D. G. g

